Polaris is pitching the RZR Pro R Factory Boost at up to 400 horsepower, enough to edge past the 394 hp of a U.S.-spec Audi RS3. The race-ready side-by-side starts at $200,000 and is built by the RZR Factory Racing team. Its first competitive outing is King of the Hammers in early 2027.
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An off-road buggy out-muscling a compact performance sedan on paper reads well on a spec sheet, but the comparison hides a lot of differences in what the two machines are for.
A turbocharged four tuned beyond 400 horsepower
Power comes from the ProStar Fury, a turbocharged 2.0-liter inline-four. Carscoops gives the output as 400 hp, while RideApart says Polaris states “up to 400 hp” and admits it is unsure what “up to” means, speculating about an overboost or anti-lag function that works in short bursts. Polaris has not said how long any peak figure holds or whether the number applies at altitude, an issue the company addressed on the standard model by designing its turbo to hold peak power at elevations up to 10,000 feet.
The Factory Boost sits above the standard RZR Pro R Boost, which Polaris unveiled with 275 hp and a $49,999 starting price, with dealer shipments set for November 2026. Reid Wilson, president of Polaris Off-Road Vehicles, framed that launch around more than 70 years of listening to riders.
The RS3 figure is Carscoops’ benchmark. When the car was introduced, Evo reported the same 394bhp rating, so the 400 hp claim leads by a thin margin and only if the top-end number is sustained. The Boost version is the turbocharged edition of the standard Pro R. The Drive reported that Polaris claims 275 hp at 7,000 rpm and 223 lb-ft at 6,000 rpm from a 60-millimeter Garrett turbocharger, which is 50 hp more than the naturally aspirated Pro R, with top speed staying at 92 mph. The Factory Boost therefore claims roughly 125 hp more than the production Boost, which is the real size of the jump over the production turbo model.
Longer chassis, live-valve shocks and a MoTeC brain
The Factory Boost rides on a wheelbase 6.5 inches longer than the standard model, with a cab two inches wider and carbon fiber bodywork reshaped for airflow and less drag. A competition cage and race-spec safety gear come standard. Suspension uses DYNAMIX DV Live Valve shocks with three-inch internal bypasses, a Fox steering damper and BFGoodrich tires, and a MoTeC package with its own ECU manages power distribution.
Range is quoted at over 200 miles per fill, though the two reports disagree on the tank: Carscoops says 34 gallons and RideApart says 45.
The vehicle is not road-legal, which is a large part of why a sedan comparison flatters it. The Audi carries passengers on pavement for daily use, while the Polaris is built for desert and rock racing, where a bigger fuel load, a stiffer cage and long-travel shocks matter more than a quick sprint. Each Factory Boost is built by the RZR Factory Racing team, and the $200,000 starting price compares with the $49,999 to $56,999 range Polaris set for the standard Pro R Boost trims.
RideApart’s description of the hardware adds a 45-gallon long-range fuel cell and shock shafts upgraded to one inch for strength and a broader dynamic range. For perspective, The Drive set the standard Pro R Boost against the 240-hp Can-Am Maverick R and the 250-hp Kawasaki Teryx H2, and called the Boost the most expensive side-by-side on the market at the time. A $200,000 sticker now makes that title look modest, and RideApart’s own report labels the Factory Boost the most powerful and most expensive UTV ever.
Who can order one, and the King of the Hammers calendar
At $200,000 the base price is almost three times the RS3’s starting price, according to Carscoops, and accessories and custom parts add to it. Buyers do not need a racing team or any competitive background to place an order, which sets the Factory Boost apart from a purpose-built team car. Polaris has not disclosed how many units it will build, and RideApart reports that first customers have until February 15, 2027 to place orders for the initial batch.
The vehicle complements the Gen 2 RZR Pro R Factory rather than replacing it. Polaris announced that earlier model in a release describing it as the industry’s only factory-built race-ready side-by-side, and the new model extends that idea with turbo power.
King of the Hammers runs January 21 to February 6, 2027, so the order window closes after the event ends. That timing means the first public evidence of what the engine really makes will arrive before most buyers commit, and Polaris has yet to say whether the 400 hp figure is a sustained rating or a peak.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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